Fifty years ago, mysterious creatures known as the "Huge" suddenly appeared all over the world, posing an existential threat to humanity. To defend against these menaces, soldiers in the form of teenage girls known as "Lilies" use the energy "Magie" within their bodies to power weapons called "Counter Huge ARMS" or "CHARMS." After being saved by a Lily two years ago while evacuating from a Huge attack, Riri Hitotsuya...